Panasonic Cf-29 no charge lights and no power light

I have 2 CF-29's. One works fine. The other used to and now it is completely dead. Even exchanging the batteries from the other one 100% charged fails to power it up. Both charging power supplies are putting out 19.5 volts. Visually from the outside, the power jack seems ok. But the key is that it won't power on with either a fresh battery or power supply. Is there a fuse inside that may be blown? How reliable is the power button (the one used to turn it on). I have a DVM and am thinking about testing motherboard points. However I don't have a schematic to go by?
Thanks, Dennis

 

Had u read this one?: http://forum.notebookreview.com/panasonic/705531-cf-52-mk3-led-backlit-inverter.html#post9051016

 

Welcome to the Toughbook Forum
Could you post your full model number so we can get a better picture of what 29 you have.

 

Yes, CF-29ETP20KM is the bad one. If the backlit power inverter is bad, would it affect the charge and power lights? Because it seems totally dead. When I gave it to my daughter for her kids, it worked fine. I gave 2 of them to her kids because they were hard on notebooks such as breaking screens and etc. I figured a toughbook would be ideal for them. The other toughbook I gave them, CF-2929C3KGZDM works fine.
The one that is bad has a touchscreen. The one that functions doesn't!

 

Just open it and have a look and use ur DVM.
The inverter has his own fuse.

 

Dennis, I sure hope that's typo and you meant 16.5 volts, which is nominal for Panasonic (and some IBM chargers). Do not use a charger with 19.5 volts output. It will surely fry your motherboard.

 

Nice catch. I missed that.
Who was the guy a year or so back that put 19.5 volts to a cf29 and it quit? We all thought it was toast, but he put a 16 volt adapter on it and it came back to life. I don't think it was Orphanir. But it was someone in a very remote location. I could not find it via any search.

 

Yes, it is 19.5v. Both chargers. One is a Toshiba charger and the other one is a Delta Electronics 19.0v. However the dead laptop will not come on even with a fully charged battery and no charger?
The other laptop works fine? I measured the output voltage of both chargers. It reads 19.0v with a DVM and open output (no load).

 

At this point, I think I need to open up the dead cf29 and start tracing the input voltages. However I don't have a schematic or a pcb diagram or picture of voltage or pinout locations. You need both to do a accurate check?
Thanks, Dennis

 

Is there an I/O power board that may be bad or is that part of the motherboard?
Might be better for me to stick a working motherboard in the thing and getting 2,16v chargers so this won't happen again?

I also found some CF-29's on Ebay for less than $60, HDD, Caddy missing, but will boot to bios. Might be easier and faster to just purchase one of these and transfer those items from my dead one.

Or what would you do???
Thanks, Dennis

 

Are most CF-29 motherboards swappable? There are some CF-29's on ebay for as low as $30-40 with shipping. HDD, Cdrom, Battery, and power supply not included. Guaranteed to boot to bios. I could either swap motherboards or put those items in the one I bought from Ebay. Sometimes it's not worth trying to troubleshoot.
Thanks, Dennis

 

Draining a battery overnight sounds like a story we have heard before. I can't remember who.

Buy another cf29 and put your battery and drives in it. You'll be done in 10 minutes. Try to get the same mk as you had before.

 

Call me first. I have some guaranteed parts available. I have a lower half for MK2 sitting right here I have been using for testing LCD's for burn marks before using them.
By guaranteed I mean you know where to find me and the unit is tested and I will back up my work.
That refurbished bit on ebay cracks me up. Read the definition of refurbished some time and see who's totally honest.

You can not upgrade your lower half to a higher motherboard without some dremel work. MK 3,4,5 have two USB slots.

You can use your parts on a MK3, 4, 5 if you don't need the PS/2 port. You will need to use a different restore disk but the pieces will fit. I like the mark 4 and 5 for the SDReader. IOW look for a complete lower for the "newer" models. Yep I have one. One hidden cost would be the ram.

Thanks,

Jeff

Edit: Reading Shawn's post...he's going the very simplest and cheapest way. IOW no new restore disk, ram etc. And he's right.

 

Ya know, I never get tired of hearing that.

You're not the first to say that about me .:hi2:

 

I think the very first priority will be to get a power adapter with the correct output voltage of 16.5. Get that and try it first. Always go for the simplest solutions first.

Sent from my Nexus 7 using Tapatalk HD

 

Sorry Rusty.....exactly right.

 

Ok, I ordered a correct power supply and will see what happens. Thanks for the replies

 

oK, Just got the correct charger, but still no lights or operation. Am thinking about ordering a schematic for the mainboard to troubleshoot voltages. Gut feeling is that there is a fuse or something blown between the battery and the charge port?

 

You have a PM

 

Its better to change the whole system board. Based on your account, you are using a 19Vdc charger which beyond to what is reguired. Due to long period of used of those Adaptor some components stress out or burn out even if you repaired one or two component. Sooner or later other components will fail again.


ohlip